Voice & data communications handbook.
Bates, Bud.
Voice & data communications handbook. Bud.Bates - New York. McGraw Hill. 1995 - xx; 699p
621.3815 / BAT-V
Voice & data communications handbook. Bud.Bates - New York. McGraw Hill. 1995 - xx; 699p
621.3815 / BAT-V